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English Verbs Starting with I

Irregular verb forms

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Verb Simple Past Past Participle
to institute instituted instituted
to institutionalize institutionalized institutionalized
to instruct instructed instructed
to insulate insulated insulated
to insult insulted insulted
to insure insured insured
to integrate integrated integrated
to intellectualize intellectualized intellectualized
to intend intended intended
to intensify intensified intensified
to inter interred interred
to interact interacted interacted
to intercede interceded interceded
to intercept intercepted intercepted
to intercommunicate intercommunicated intercommunicated
to interconnect interconnected interconnected
to interest interested interested
to interfere interfered interfered
to interlace interlaced interlaced
to intermediate intermediated intermediated
to intermingle intermingled intermingled
to intern interned interned
to internalize internalized internalized
to internationalize internationalized internationalized
to interpolate interpolated interpolated
to interpose interposed interposed
to interpret interpreted interpreted
to interrogate interrogated interrogated
to interrupt interrupted interrupted
to intersect intersected intersected
to intertwine intertwined intertwined
to intervene intervened intervened
to interview interviewed interviewed
to interweave interwove interwoven
to intimate intimated intimated
to intimidate intimidated intimidated
to intone intoned intoned
to intoxicate intoxicated intoxicated
to intrigue intrigued intrigued
to introduce introduced introduced
to intrude intruded intruded
to inundate inundated inundated
to invade invaded invaded
to invalidate invalidated invalidated
to invent invented invented
to invert inverted inverted
to invest invested invested
to investigate investigated investigated
to invigorate invigorated invigorated
to invite invited invited
to invoice invoiced invoiced
to invoke invoked invoked
to involve involved involved
to iodize iodized iodized
to iron ironed ironed
to irradiate irradiated irradiated
to irrigate irrigated irrigated
to irritate irritated irritated
to isolate isolated isolated
to issue issued issued
to italianize italianized italianized
to itch itched itched
to itemize itemized itemized
to iterate iterated iterated
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